Why can Traits have directly called methods when they are static?

I just asked a question about Traits and I had another question.

If Traits are mechanisms that facilitate the import of methods, because of the limitations of an inheritance in PHP, why can their methods be accessed statically?

For example:

trait Stack
{
    protected $items = [];

    public static function say()
    {
        return 'stack';
    }

}

echo Stack::say(); // stack

Is not this confusing considering the meaning of trait implementation in language?

Is it recommended to use a static method from a trait , or is it better to use it in a class?